/* ===== RESET Y FUENTES PROFESIONALES ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --azul-profesional: #1976D2;
    --azul-hover: #1565C0;
    --blanco-puro: #FFFFFF;
    --blanco-suave: #F8F9FA;
    --gris-elegante: #6B7280;
    --gris-claro: #E5E7EB;
    --sombra-delicada: 0 4px 20px rgba(0, 0, 0, 0.08);
    --sombra-intensa: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transicion-rapida: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);

    /* Gap inferior seguro (gestos + burbuja flotante) */
    --bottom-gap: calc(env(safe-area-inset-bottom, 0px) + 88px);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
}

/* ===== HEADER PRINCIPAL - ELEGANTE ===== */
.main-header {
    background: var(--blanco-puro);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gris-claro);
    box-shadow: var(--sombra-delicada);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transicion-rapida);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 85px;
}

/* ===== LOGO MEJORADO ===== */
.logo-container { flex-shrink: 0; }

.logo-link {
    display: block;
    text-decoration: none;
    transition: var(--transicion-rapida);
}

.logo-img {
    height: 55px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo-link:hover .logo-img { transform: scale(1.05); }

/* ===== NAVEGACIÓN ELEGANTE ===== */
.desktop-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 3rem;
    align-items: center;
}

.nav-link {
    color: var(--gris-elegante);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.05rem;
    padding: 0.75rem 0;
    position: relative;
    transition: var(--transicion-rapida);
    letter-spacing: -0.01em;
}

.nav-link:hover { color: var(--azul-profesional); }

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--azul-profesional);
    transition: var(--transicion-rapida);
    transform: translateX(-50%);
}

.nav-link:hover::after { width: 100%; }

/* ===== ICONOS DE REDES SOCIALES MEJORADOS ===== */
.header-social {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: var(--blanco-suave);
    border: 1.5px solid var(--gris-claro);
    transition: var(--transicion-rapida);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.social-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--azul-profesional);
    transition: var(--transicion-rapida);
    z-index: 1;
}

.social-btn:hover::before { left: 0; }

.social-btn:hover {
    transform: translateY(-2px);
    border-color: var(--azul-profesional);
    box-shadow: 0 6px 20px rgba(25, 118, 210, 0.15);
}

.social-img {
    width: 22px;
    height: 22px;
    transition: var(--transicion-rapida);
    position: relative;
    z-index: 2;
    filter: brightness(0) saturate(100%) invert(33%) sepia(98%) saturate(1387%) hue-rotate(193deg) brightness(91%) contrast(101%);
}

.social-btn:hover .social-img { filter: brightness(0) invert(1); }

/* ===== BOTÓN MENÚ MÓVIL MEJORADO ===== */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 0.35rem;
    transition: var(--transicion-rapida);
}

.menu-bar {
    width: 26px;
    height: 2.5px;
    background: var(--azul-profesional);
    transition: var(--transicion-rapida);
    border-radius: 2px;
}

.mobile-menu-btn:hover .menu-bar { background: var(--azul-hover); }

.mobile-menu-btn.active .menu-bar:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.mobile-menu-btn.active .menu-bar:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active .menu-bar:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

/* ===== MENÚ MÓVIL MEJORADO ===== */
.mobile-nav {
    position: fixed;
    top: 85px;
    left: 0;
    width: 100%;
    height: calc(100vh - 85px); /* valor de fallback */
    background: var(--blanco-puro);
    transform: translateX(-100%);
    transition: var(--transicion-rapida);
    z-index: 999;
}

/* Alto correcto en móviles (evita corte inferior) */
@supports (height: 100dvh) {
  .mobile-nav {
    height: calc(100dvh - 85px);
  }
}

.mobile-nav.active { transform: translateX(0); }

.mobile-nav-content {
    padding: 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;

    /* FIX: scroll y espacio inferior seguro */
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--bottom-gap);
}

.mobile-nav-menu { list-style: none; flex: 1; }

.mobile-nav-link {
    display: block;
    color: var(--gris-elegante);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.2rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--gris-claro);
    transition: var(--transicion-rapida);
}

.mobile-nav-link:hover {
    color: var(--azul-profesional);
    padding-left: 0.5rem;
}

/* ===== SECCIÓN REDES MÓVIL MEJORADA ===== */
.mobile-social-section {
    margin-top: auto;
    padding-top: 2rem;
    border-top: 1px solid var(--gris-claro);
}

/* FIX: Mostrar siempre los 4 iconos completos (2x2) en móviles */
.mobile-social-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.mobile-social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 50px;
    border-radius: 12px;
    background: var(--blanco-suave);
    border: 1.5px solid var(--gris-claro);
    transition: var(--transicion-rapida);
    text-decoration: none;
}

.mobile-social-btn:hover {
    transform: translateY(-2px);
    border-color: var(--azul-profesional);
    box-shadow: 0 6px 20px rgba(25, 118, 210, 0.15);
}

.mobile-social-btn img {
    width: 22px;
    height: 22px;
    transition: var(--transicion-rapida);
}

/* ===== EFECTOS DE SCROLL MEJORADOS ===== */
.main-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--sombra-intensa);
    height: 75px;
}

.main-header.scrolled .header-container { height: 75px; }
.main-header.scrolled .logo-img { height: 50px; }

/* ===== RESPONSIVE MEJORADO ===== */
@media (max-width: 1024px) {
    .header-container { padding: 0 1.5rem; }
    .nav-menu { gap: 2rem; }
    .social-btn { width: 44px; height: 44px; }
    .social-img { width: 20px; height: 20px; }
}

@media (max-width: 768px) {
    .desktop-nav,
    .header-social { display: none; }

    .mobile-menu-btn { display: flex; }

    .header-container {
        padding: 0 1rem;
        height: 75px;
    }

    .logo-img { height: 50px; }

    .mobile-nav {
        top: 75px;
        height: calc(100vh - 75px); /* fallback */
    }
    @supports (height: 100dvh) {
      .mobile-nav { height: calc(100dvh - 75px); }
    }
}

/* Ajustes finos */
@media (max-width: 480px) {
    .header-container { padding: 0 0.75rem; }
    .logo-img { height: 45px; }

    .mobile-nav-content { padding: 1.5rem; }
    .mobile-nav-link { font-size: 1.1rem; padding: 1rem 0; }

    .mobile-social-grid { gap: 0.75rem; }
    .mobile-social-btn { height: 50px; }
    .mobile-social-btn img { width: 22px; height: 22px; }
}

/* En móviles anchos, si cabe, mostrar 4 en una sola fila */
@media (min-width: 560px) and (max-width: 767.98px) {
    .mobile-social-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ===== ANIMACIONES SUAVES ===== */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.main-header { animation: fadeInDown 0.6s ease-out; }